Quality and Autogard are synonymous with overload protection. The company’s reputation for high quality products is derived from over 35 years of design innovation and production. Autogard products are manufactured to meet ISO 9001 using the latest machine tools and high quality materials.

Autogard backlash-free safety couplings work as spring-loaded positive couplings. The special roller or ball guides guarantee a totally backlash-free transmission of the torque in both directions of rotation. The couplings are therefore especially suitable for use in speed and direction controlled drives in conjunction with a closed control loop.

Uniform loading of the rollers and balls guarantees high system stiffness, which is important especially for modern servo drives. The roller or ball guides simultaneously guarantee high reliability and switching frequencies when used with high dynamic servo drives.

Cylinderical roller Locking Element for low, medium and high dynamic loads Suitable for types 1,2,3,5,6

Ball style Locking Element for low and medium dynamic loads Suitable for types 7, 8, 9, 10

In the event of an overload the rollers or balls move out of the guides (see figures 1 and 2). This results in an axial movement, which activates a proximity switch or limit switch that immediately makes contact to switch off the drive. To avoid damage to the safety coupling, the drive must be switched off immediately after an overload. Autogard backlash-free safety couplings were developed for especially dynamic drives operated under constantly changing directions of rotation and under high acceleration.

Figure 1 Roller principle   Figure 2 Ball principle